Curved back chair



FIG. 1 is a perspective view of a curved back chair showing the new andornamental design;

FIG. 2 is a right elevation view of the curved back chair of FIG. 1;

FIG. 3 is a rear elevation view of the curved back chair of FIG. 1; and,

FIG. 4 is a bottom plan view of the curved back chair of FIG. 1.

The ornamental design for a curved back chair, as shown and described.